阅读说明：本技术 一种解决轮毂类收缩缺陷的装置及工艺方法 (Device and process method for solving shrinkage defect of hubs ) 是由 张俊涛 杨红生 侯东亮 王平 胡海燕 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种解决轮毂类收缩缺陷的装置及工艺方法,涉及轮毂技术领域,包括轮毂铸件、内腔砂芯、易隔片砂芯、冒口、发热冒口套、工艺补贴、轮毂法兰,所述轮毂法兰设置在内腔砂芯的外侧面,所述易隔片砂芯设置在轮毂法兰的上方侧面,所述发热冒口套设置在易隔片砂芯的上方,所述冒口由凹陷部分和冒口型腔组成。本发明通过设置易隔片砂芯和工艺补贴,有效地缩短了补缩源冒口至补缩对象铸件热节的补缩距离,利用发热冒口套中铝热剂的发热作用,持续对冒口中金属液提供热量,延长了冒口中金属液补缩流动的时间,通过上述工艺措施的配合,用最经济的冒口充分地对轮毂类环形铸件的热节进行补缩,从而避免出现集中性的收缩缺陷产生。(The invention discloses a device and a process method for solving the shrinkage defect of wheel hubs, and relates to the technical field of wheel hubs. The invention effectively shortens the feeding distance from the feeding source riser to the hot spot of the casting to be fed by arranging the easy-parting-piece sand core and the process patch, continuously provides heat for molten metal in the riser by utilizing the heating action of the aluminum thermite in the heating riser sleeve, prolongs the time for feeding and flowing of the molten metal in the riser, and fully feeds the hot spot of the hub annular casting by using the most economical riser through the matching of the process measures, thereby avoiding the generation of the concentrated shrinkage defect.)

1. The utility model provides a solve wheel hub class shrink defect's device, includes wheel hub foundry goods (1), inner chamber psammitolite (2), easy spacer psammitolite (3), rising head (4), exothermic riser cover (5), technology subsidy (6), wheel hub flange (7), its characterized in that: the wheel hub foundry goods (1) is the solid of revolution, inner chamber psammitolite (2) set up in the centre bore of wheel hub foundry goods (1), wheel hub flange (7) set up the lateral surface at inner chamber psammitolite (2), easy spacer psammitolite (3) set up the top side at wheel hub flange (7), riser cover (5) that generate heat set up the top at easy spacer psammitolite (3), the sunk part has been seted up at the top of easy spacer psammitolite (3), the rising head die cavity with sunk part looks adaptation is seted up to the below of the riser cover (5) that generate heat, rising head (4) comprise sunk part and rising head die cavity, technology subsidy (6) set up the corner at wheel hub foundry goods (1) and wheel hub flange (7), technology subsidy (6) and easy spacer psammitolite (3) adaptation.

2. The device for solving the hub shrinkage defect of claim 1, wherein: the easy-to-separate piece sand core (3) is arranged at a position close to a hub flange (7) hot junction, the easy-to-separate piece sand core (3) is not in contact with the hot junction, and a balanced solidification riser is arranged.

3. The device for solving the hub shrinkage defect of claim 1, wherein: the heating riser sleeve (5) is filled with thermite, and the riser (4) is filled with molten metal.

4. The device for solving the hub shrinkage defect of claim 1, wherein: the inner wall of wheel hub foundry goods (1) is provided with the ring channel, the cross-section of ring channel is the notch cuttype, the top wall thickness of wheel hub foundry goods (1) is greater than the bottom wall thickness of wheel hub foundry goods (1).

5. The device for solving the hub shrinkage defect of claim 1, wherein: the position, shape and size of the process patch (6) are matched with the structure and the size of the hot spot of the hub casting (1).

6. The process method for solving the hub shrinkage defect according to claim 1, wherein the process method comprises the following steps: the hub casting (1) is arranged on the outer side of the inner cavity sand core (2), the riser (4) is arranged between the easy-spacing piece sand core (3) and the heating riser sleeve (5), the position, the shape and the size of the process patch (6) are arranged in a matched mode according to the actual structure and the size of a hot spot, and the heating riser sleeve (5) is fixed through interference fit with a sand tire or a method of inserting a steel nail into the sand tire;

the molten iron is introduced into a casting mold cavity from a flange through a dispersion ingate, the molten iron firstly enters a riser cavity inside a heating riser sleeve (5) in the pouring process and then overflows through a process patch (6), high-temperature molten metal enters the heating riser sleeve (5) to ignite the heating riser sleeve (5) in the process, thermite in the heating riser sleeve (5) is subjected to exothermic reaction, heat is continuously supplemented to the molten metal in a riser (4), liquid metal for supplementing is continuously provided for a hot joint part of a hub casting (1) at the same time, and a volume vacancy generated due to solidification and shrinkage of the hot joint is supplemented.

Technical Field

The invention relates to the technical field of hubs, in particular to a device and a process method for overcoming the shrinkage defect of hubs.

Background

The wheel hub casting is one of automobile safety protection parts, most of products are hollow annular castings, and the structure mainly comprises a flange and an upper through body and a lower through body; a thicker and larger geometric thermal node is formed at the junction position of the flange and the cylinder body and is often the final solidification position of a casting. Because the feeding distance is long, the required amount of feeding molten metal is large, the traditional sand feeder head is difficult to continuously provide the molten metal required by feeding to the hot joint part, and a concentrated shrinkage defect is formed at the position often, so that the effective bearing sectional area of a casting is influenced. Particularly, with the implementation of the policy of energy conservation and emission reduction in recent years, the light-weight design of vehicles is more and more common, and the number of local and isolated automobile parts is more, so how to ensure the internal compactness of hub castings through reasonable technological measures is an important guarantee for the driving safety of the vehicles.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a device and a process method for solving the shrinkage defect of hubs, which have the advantages of solving the shrinkage defect of the hub castings, ensuring internal compactness and the like, and solve the problems in the background art.

(II) technical scheme

In order to solve the shrinkage defect of the hub castings and ensure internal compactness, the invention provides the following technical scheme: the device comprises a hub casting, an inner cavity sand core, an easy-to-separate piece sand core, a riser, a heating riser sleeve, a process patch and a hub flange, wherein the hub casting is a revolving body, the inner cavity sand core is arranged in a central hole of the hub casting, the hub flange is arranged on the outer side surface of the inner cavity sand core, the easy-to-separate piece sand core is arranged on the side surface above the hub flange, the heating riser sleeve is arranged above the easy-to-separate piece sand core, a concave part is arranged at the top of the easy-to-separate piece sand core, a riser cavity matched with the concave part is arranged below the heating riser sleeve, the riser consists of the concave part and the riser cavity, the process patch is arranged at the corner of the hub casting and the hub flange, and the process patch is matched with the easy-to-separate piece sand core.

Preferably, the sand core of the easy separation piece is arranged at a position close to a hot junction of a hub flange, the sand core of the easy separation piece is not contacted with the hot junction, and a balanced solidification riser is adopted.

Preferably, the exothermic riser sleeve is filled with an aluminothermic agent, and the riser is filled with molten metal.

Preferably, the inner wall of wheel hub foundry goods is provided with the ring channel, the cross-section of ring channel is the notch cuttype, the top wall thickness of wheel hub foundry goods is greater than the bottom wall thickness of wheel hub foundry goods.

Preferably, the position, the shape and the size of the process patch are matched with the structure of the hub casting and the size of the thermal joint.

A technological method for solving the shrinkage defect of wheel hubs comprises the steps that a wheel hub casting is arranged on the outer side of an inner cavity sand core, a riser is arranged between an easy-to-separate piece sand core and a heating riser sleeve, the position, the shape and the size of a technological patch are arranged in a matched mode according to the actual structure and the size of a hot spot, and the heating riser sleeve is fixed through interference fit with a sand tire or a method of inserting a steel nail into the sand tire;

the molten iron is introduced into a casting mould cavity from a flange through a dispersion ingate, molten iron firstly enters a riser cavity inside a heating riser sleeve in the pouring process and then overflows through a process patch, and high-temperature molten metal enters the heating riser sleeve to ignite the heating riser sleeve in the process, so that thermite in the heating riser sleeve is subjected to exothermic reaction, heat is continuously supplemented to the molten metal in a riser, liquid metal for feeding is continuously provided for a wheel hub casting hot joint part, and a volume vacancy generated due to solidification shrinkage of the hot joint is supplemented.

Three beneficial effects

Compared with the prior art, the invention provides a device and a process method for solving the shrinkage defect of hubs, and the device and the process method have the following beneficial effects:

according to the device and the process method for solving the shrinkage defect of the wheel hubs, the easy-to-separate sand core and the process patch are arranged, so that the feeding distance from a feeding source riser to a hot junction of a feeding object casting is effectively shortened, heat is continuously provided for molten metal in the riser by utilizing the heating action of an aluminum thermite in the heating riser sleeve, and the time for molten metal in the riser to flow in a feeding way is prolonged; through the matching of the technical measures, the most economical feeder head is used for fully feeding the hot spot of the annular casting such as the hub, thereby avoiding the occurrence of concentrated shrinkage defects.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

In the figure: 1. a hub casting; 2. an inner cavity sand core; 3. a knock-off core; 4. a riser; 5. a heating riser sleeve; 6. a process patch; 7. a hub flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a device and a process method for solving the hub shrinkage defect comprise a hub casting 1, an inner cavity sand core 2, an easy-to-separate piece sand core 3, a riser 4, a heating riser sleeve 5, a process patch 6 and a hub flange 7, and are characterized in that: the hub casting 1 is a revolving body, the inner wall of the hub casting 1 is provided with an annular groove, the section of the annular groove is in a step shape, the wall thickness of the top of the hub casting 1 is greater than the wall thickness of the bottom of the hub casting 1, an inner cavity sand core 2 is arranged in a central hole of the hub casting 1, a hub flange 7 is arranged on the outer side surface of the inner cavity sand core 2, an easy-to-separate sand core 3 is arranged on the upper side surface of the hub flange 7, the easy-to-separate sand core 3 is arranged at a position close to the heat junction of the hub flange 7, the easy-to-separate sand core 3 is not contacted with the heat junction, a balanced solidification riser is arranged, a heating riser sleeve 5 is arranged above the easy-to-separate sand core 3, the top of the easy-to-separate sand core 3 is provided with a concave part, a riser cavity matched with the concave part is arranged below the heating riser sleeve 5, a riser 4 consists of the concave part and the riser cavity, and the heating riser sleeve 5 is filled with an aluminum thermal agent, the inside of rising head 4 is filled with the metal liquid, and technology subsidy 6 sets up in the corner of wheel hub foundry goods 1 with wheel hub flange 7, and technology subsidy 6 and the adaptation of easy spacer psammitolite 3, and the position, shape, the size of technology subsidy 6 and the structure of wheel hub foundry goods 1 and heat festival size looks adaptation.

The hub casting 1 is arranged on the outer side of the inner cavity sand core 2, the riser 4 is arranged between the easy-parting-piece sand core 3 and the heating riser sleeve 5, the position, the shape and the size of the process patch 6 are arranged in a matching way according to the actual structure and the size of a hot spot, and the heating riser sleeve 5 is fixed by interference fit with a sand tire or a method of inserting a steel nail into the sand tire;

the molten iron is introduced into a casting mould cavity from a flange through a dispersion ingate, molten iron firstly enters a riser cavity in the heating riser sleeve 5 in the pouring process and then overflows through a process supplement patch 6, high-temperature molten metal enters the heating riser sleeve 5 to ignite the heating riser sleeve 5 in the process, thermite in the heating riser sleeve 5 is subjected to exothermic reaction, heat is continuously supplemented to the molten metal in the riser 4, liquid metal for feeding is continuously provided for a heat section of the hub casting 1, and volume vacancy generated due to solidification and shrinkage of the heat section is supplemented.

In conclusion, the device and the process method for solving the shrinkage defect of the wheel hubs effectively shorten the feeding distance from the feeding source dead head 4 to the hot spot of the casting to be fed through the arrangement of the easy-to-separate piece sand core 3 and the process patch 6, continuously provide heat for the molten metal in the dead head 4 by utilizing the heating action of the aluminum thermite in the heating dead head sleeve 5, and prolong the time for the molten metal in the dead head 4 to flow in a feeding way; through the matching of the technical measures, the most economical feeder head 4 is used for fully feeding the hot spot of the annular casting of the hub class, thereby avoiding the occurrence of concentrated shrinkage defect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.